plead the sip
When you take a sip of your drink instead of answering an awkward question (à la plead the fifth)
Sarah: Joe, I'd like to be more than friends. What do you think?
Joe: *sips drink*
Sarah: Dammit Joe, don't just plead the sip! Grow a pair and turn me down like a man.
Joe: *sips drink*
Sarah: Dammit Joe, don't just plead the sip! Grow a pair and turn me down like a man.