get off withsb
—phrasal verbwithgetverbuk/ɡet/us/ɡet/present participlegetting|past tensegot|past participlegotorUSusuallygotten
UKslangtobeginasexualrelationshipwith someone
与（某人）发生性关系，与（某人）上床
She'd got off with someblokeat theparty.她和一个在聚会上认识的家伙搞上了。