mouthful
n
1 [C] as much as can easily be put into the mouth at one time 一口(的量)
eat a few mouthfuls of food 吃几口食物
swallow sth in a/one mouthful 一口吞下某物.
2 [sing] (infml joc 口, 谑) word or phrase that is too long or difficult to pronounce 长或拗口的词语
Timothy Thistlethwaite? That´s a bit of a mouthful! 蒂莫西?西斯尔思韦特? 真有点绕嘴!