From the same phrase family as 'i have', 'i would', 'i'd tap' etc.
Used when somebody is particularly
impressed by something, most frequently a person. Literally means 'I have', but said in
a German accent to
give it that extra 'ooft!'.
"Did you see that
cumslut last night? I had her a few days ago... she walked past and i was all like 'Ooft, I haff!'"
Boy sees profile picture of hxc emo hawt grrll, and comments: NO JK JK JK LOLOLOL,
I HEART UR FXCKING MAKE UP OMG I LOVE UR HAIR.
OOFT, I HAFF!