柯林斯詞典hard-on (hard-ons) 1. N-COUNT If a man has a hard-on, he has an erection. 陰莖勃起[VULGAR] The thought of this had stirred him up; he actually had a hard-on. 這個想法挑起了他的情緒；他竟勃起了。 返回 hard-on劍橋詞典an erection (= the condition of the penis when it is stiff ) （陰莖的）勃起 to have a hard-on 陰莖勃起 返回 hard-on