(pos:語句)(label:粗俗)yue:歇後語：事鳩但；指#事但、#冇所謂；「事鳩」取自童軍英文「Scout」嘅音譯，加上同「彈」同音嘅「但」eng:sandwich pun meaning "couldn't care less"; literally, scout jumping on the trampoline
