thonk exclamation 1verb 1forms 3 exclamation1 •(Internet) Used ironically in reaction to a conclusion seen as illogical.That guy robbed me once already, so he won't do it again. Thonk. verb1 •(Internet) To think deeply; to ponder.I had to thonk long and hard before coming to a decision. formsthonked · thonking · thonks
