To accept, admit, or recognize something, or the truth or existence of something.

Got the covid-19 vaccine

to accept that something is true
acknowledge something She refuses to acknowledge the need for reform.
Are you prepared to acknowledge your responsibility?
acknowledge that… The government acknowledged that the tax was unfair.
acknowledge something to be, have, etc. something It is generally acknowledged to be true.

Something senpai will never do.

If you have received a blow job it is referred to as knowledge or brains. The act of the blow job is considered acknowledge, knowledge in the act.