clutter [sth] up, clutter up [sth]vtr phrasal insepphrasal verb, transitive, inseparable: Verb with adverb(s) or preposition(s), having special meaning, not divisible--for example,"go with" [=combine nicely]: "Those red shoes don't go with my dress." NOT [S]"Those red shoes don't go my dress with."[/S]
riempire alla rinfusa vtr
Please take your belongings with you. You don't need to clutter up my car.
Per favore portati via le tue cose. Non devi riempire alla rinfusa la mia auto.