Have (something) under (one's) belt phrase
The verb "get" can substitute for the verb "have".
If someone "has something under his/her belt", especially food or drink, he/she consumes them.
Having healthy food under my belt makes me feel more energetic.
She has just had spicy curry under her belt, so she has heartburn now.
If someone "has something under his/her belt", he/she achieved something that benefits their career or reputation.
The famous football player - Cristiano Ronaldo - had had 5 golden balls by the time he was 34.
If someone "has something under his/her belt", he/she has learned or done something that might be useful in the future.
It's essential to have some soft skills under your belt before graduating.
The verb "have" should be conjugated according to its tense.
The expression "under one’s belt" first came into use in the late 1700s-early 1800s, and was used as the expression of a tally of how many alcoholic beverages one had consumed. Over time, the phrase "under one’s belt" came to mean consuming food, also. By the 1920s-1930s, "under one’s belt" came to mean acquiring knowledge, talent, or experience.
A problem or difficult circumstance
I'm short-sighted, so forgetting my glasses is a real hair in the butter for my sight.