YOU SAID:
he had pumped his pants
INTO JAPANESE
彼はズボンをパンプした
BACK INTO ENGLISH
he pumped his pants
INTO JAPANESE
彼はズボンを上げた
BACK INTO ENGLISH
he pulled up his pants
INTO JAPANESE
彼はズボンを引き上げた
BACK INTO ENGLISH
he pulled up his pants
You love that! Don't you?