shtup - Jewish English Lexicon To stuff into (haphazardly) v To push, shove "Yossi thought about offering her ten bucks for a quick shtup " (Unchosen, by Hella Winston) "He was shtupping one of his own staffers who was married to another " "Just take your finger and shtup it into the soup to see if it's hot "
Shtup - Etymology, Origin Meaning - Etymonline Senses having to do with "bring or come to a halt; discontinue or cause to cease from a course or action" developed in 15c in English (but have been adopted in other languages) They extend from the notion of "prevent a flow by blocking a hole," and in some cases the sense might have been influenced by Latin stupere "be stunned, be stupefied "