A person who often sucks up to people in such a convincing fashion that he often convinces them that he is actually sincere with his flattery, so much so that the suckee metaphorically creams in his mouth. Like a suck up, but worse.
That suckoff is always raising his hand in class; why doesn't the teacher see right through him?
The action of two people having sex, one shoves several boba balls up one or both their holes and the other uses a boba straw to suck them out repeatedly.
“Hey do you wanna go to the bed and do a boba suckoff?”
“How did you get in my house?”