If you take two hits of weed how long will it stay in ur system 5"8 180lbs

It depends. Strength of herb dilution of urine body fat sensitivity of test etc. All these variable can play a role.. That being said if not a regular user most likely will not be detected after a week..Possibly days.
- . - if this is the first time you every smoked marijuana and you took two puffs, it will most likely show no metabolite in urine within a week. If you have been a heavy user, the metabolites could in appear in urine for months.