名詞 frottage:

1. masturbation by rubbing against another person (as in a crowd)

frot.tage

n.（名詞）
The act of rubbing against the body of another person, as in a crowd, to attain sexual gratification.
摩擦淫：摩擦另一人身體的動作以獲取性快感，如在公共場合

A method of making a design by placing a piece of paper on top of an object and then rubbing over it, as with a pencil or charcoal.
擦印畫法：畫圖案的一種方法。把一張紙蓋在物體上，然后用鉛筆或石炭在上面摩擦
A design so made.
擦印畫：以擦印方式畫的畫

來源：
French
法語
from frotter [to rub]
源自 frotter [摩擦]
from Old French froter
源自 古法語 froter