| HOAS | Hold on a second | 100 |
| HTH | Hope this helps | 150 |
| hw | Homework | 125 |
| High maintenance | Requiring a lot of attention | 100 |
| HTTP | HyperText Transfer Protocol | 100 |
| haha | Laughing | 167 |
| HBO | Home Box Office | 100 |
| HTML | Hyper-Text Markup Language | 100 |
| HIV | Human immunodeficiency virus | 100 |
| HS | High school | 250 |
| HOTS | Heroes of the Storm | 200 |
| HF | Have fun | 200 |
| HDTV | High Definition TV | 200 |
| Hacktivist | Hacker activist | 200 |
| HR | Human resources | 260 |
| hood | Neighborhood | 200 |
| HFCS | High fructose corn syrup | 150 |
| h8 | Hate | 300 |
| Hot | Beautiful | 120 |
| h/w | Homework | 200 |
| How bow dah | How about that | 200 |
| Hot potting | Soaking in a superheated thermal spring | 200 |
| hlp | Help | 200 |
| HP | Health points | 200 |
| Harambe | Gorilla killed by Cincinatti Zoo officials | 150 |
| Haterade | The drink of someone who disapproves of another's actions/lifestyle | 150 |
| h8r | Hater | 150 |
| hw | Hardware | 200 |
| HRU | How are you | 175 |
| HMU | Hit me up | 175 |
| Hipster | A person who dislikes mainstream culture | 137 |
| HTTPS | HyperText Transfer Protocol Secure | 267 |
| Hottie | Attractive person | 133 |
| HIMYM | How I Met Your Mother | 233 |
| HP | Harry Potter | 262 |
| HDD | Hard Disk Drive | 200 |
| HOMM | Heroes of Might and Magic | 250 |
| HMO | Health maintenance organization | 200 |
| Hangry | Angry because you're hungry | 150 |
| HBY | How about you? | 250 |
| HUD | Heads up display | 300 |
| HYFR | Heck ya, freakin' right | 250 |
| H&K | Hugs and kisses | 250 |
| hun | Honey | 200 |
| HON | Heroes of Newerth | 300 |
| Hater | A person who is angry or jealous of someone | 250 |
| hax | Hacks | 300 |
| Hubby | Husband | 200 |
| HH | Holding hands | 300 |
| Huckleberry | The one you're looking for | 300 |
| HDL | High-density lipoprotein | 300 |
| H/O | Hold on | 300 |
| HSIK | How should I know | 300 |
| Headdesk | Extreme frustration | 233 |
| HGH | Human growth hormone | 333 |
| Hacktivism | Hacker activism | 250 |
| Hax | To encounter bad luck | 200 |
| HORU | How old are you | 300 |
| hon | Honey | 300 |
| HPT | Home pregnancy test | 300 |
| Hoops | Basketball | 300 |
| HK | Hugs and kisses | 400 |
| Huzzah | Hooray | 300 |
| hwk | Homework | 300 |
| Honky | A white person | 200 |
| HOH | Head of Household | 250 |
| HU | Hook up | 180 |
| Heater | Fastball | 300 |
| HOF | Hall of fame | 300 |
| Hack | To make changes | 300 |
| HFC | Holy freaking crap | 250 |
| Hanger | Hunger and anger | 300 |
| HS | Head shot | 233 |
| HIFW | How I felt when | 200 |
| Hot take | A controversial opinion | 233 |
| HAN | How about now? | 400 |
| hav | Have | 300 |
| HAGW | Have a good week | 300 |
| HMSL | Holding my sides laughing | 250 |
| hehe | Laughing | 250 |
| HP | Hit points | 130 |
| HAGN | Have a good night | 300 |
| HHIS | Hanging head in shame | 250 |
| HMP | Hardcore Multiplayer | 233 |
| HIG | How's it going? | 233 |
| Honkey | A white person | 300 |
| Honkie | A white person | 300 |
| Handle | Twitter username | 200 |
| Hench | Muscular | 300 |
| HEA | Happily ever after | 300 |
| H1 | First half | 200 |
| Homer | Home run | 200 |
| hmwk | Homework | 300 |
| Hiberdating | Ignoring friends while dating a person | 350 |
| HL | Half-Life | 300 |
| Hots | Attraction to a person | 250 |
| HB | Hit batsmen | 300 |
| HT | Heard Through | 400 |
| HML | Hate my life | 200 |
| Hashtalk | Spoken hashtags | 300 |