sucer de son pouce

== French == === Etymology === Calque of Dutch uit zijn duim zuigen. See also English suck out of one's thumb. === Pronunciation === IPA(key): /sy.se d(ə) sɔ̃ pus/ === Verb === sucer de son pouce (Belgium, Rwanda, Congo, transitive, informal) to guess, to predict; to invent, to pull out of one's ass; to know Synonyms: deviner, prévoir, s'attendre à, inventer, sortir de nulle part, tirer de nulle part, savoir, avoir la science infuse Je peux pas le sucer de mon pouce ! ― How should I know? Je pouvais pas le sucer de mon pouce ! ― How was I supposed to know? ==== Usage notes ==== Used in negative sentences.