1
- the upper front part of a boot or shoe鞋面, 靴面（指鞋、靴的前部）。
2
- (in jazz and popular music) a short, simple introductory passage, usually repeated several times until otherwise instructed（爵士, 流行乐的）即兴演奏（指多次重复直到叫停的简短序曲）。
1
- no obj. repeat a short, simple passage of music进行即兴伴奏（或演奏）：
the band was vamping gently behind his busy lead guitar.
乐队在他快速多变的主吉他带领下轻柔地进行即兴伴奏。
2
- with obj. attach a new upper to (a boot or shoe)修换靴（或鞋）面。
2.1
vamp something up
informal repair or improve something〈非正式〉修理; 提升：the production values have been vamped up.
产值已经提高。
词源
Middle English (denoting the foot of a stocking)： shortening of Old French avantpie, from avant 'before' + pie 'foot'. The musical sense of the verb developed from the general sense 'improvise'.