bulk up

== English == === Pronunciation === IPA(key): /ˌbʌlk ˈʌp/ === Verb === bulk up (third-person singular simple present bulks up, present participle bulking up, simple past and past participle bulked up) (intransitive) To gain weight. (transitive) To increase the weight of. (bodybuilding) To train the body with a high-calorie diet and intense weightlifting in order to increase the overall mass of the body, especially the muscles. ==== Synonyms ==== (gain weight): (increase the weight of): (increase muscle mass): hulk out ==== Translations ====