makeweight
n
1 small quantity added to get the weight required (補足所需重量的)小的量.
2 (fig 比喻) thing or person, usu of little value, that supplies a deficiency, fills a gap, etc (作填補空缺用的)不重要的人或物.
??? 情景例句
Why do we need a swimming pool? Everyone in the family hates swimming!