To rise to a higher level or standard; to improve. / (role-playing games, video games, intransitive) to level up

a wallaroo (any of three intermediate-size macropods)

time's up

(chiefly fiction, especially video games) upgrade; enhancement

(chiefly fiction, especially video games) to get upgraded; to get enhanced

a pop-up

(roof that is) thatchd with straw

(informal) increasing the size of one's chest / (informal) of one's chest, becoming larger

straw doll

uploader (Someone who uploads files) / uploader (A computer program that assists with the uploading of files) / a website to which files can be uploaded and stored for purpose of distribution