рофл, имхо и лол - пользуемся....а вот остальные... нужно взять на заметку =)
wbu: is short for ‘what about you’.
icymi: is short for ‘in case you missed it’.
rofl: is short for ‘rolling on the floor laughing’.
imho: is short for ‘in my honest opinion’.
immd: is short for ‘it made my day’.
tnf: is short for ‘that’s not funny’.
lol: is short for ‘laugh out loud’.