Denshi Jisho — Online Japanese dictionary

Found 3 sentences.

ガッツポーズしている Look at him raising his arm in triumph.
にはガッツやる気あります I'm a person with guts and a strong will.
あいつガッツポーズするて、よっぽど嬉しかっただろう It must have been something really big for him to strike a triumphant pose like that.