goof off - Wiktionary, the free dictionary

From Wiktionary, the free dictionary

• (UK) IPA^(key): /ˌɡuːf ˈɒf/
• (US, without the cot–caught merger) IPA^(key): /ˌɡuf ˈɔf/
• (cot–caught merger) IPA^(key): /ˌɡuf ˈɑf/

goof off (third-person singular simple present goofs off, present participle goofing off, simple past and past participle goofed off)

1. (US, Australia, slang) To dawdle, lollygag; to waste time aimlessly or engage in idle activity or inactivity.

   He sat there goofing off all day instead of working.
2. (US, dated, slang) To make a mistake.

   He goofed off this whole project.

3. (US, dated, slang) To fall asleep or pass out on drugs.