blood is thicker than water

(proverb) relationships between family members (blood) are stronger than other relationships (water)

Example Sentences:

A: I can’t decide if I should go to my brother’s birthday party or my roommate’s!
B: Remember that blood is thicker than water. You should go to your brother’s!
A: Yeah, you’re right.

Similar idioms:

1. bad blood
2. get into hot water
3. throw cold water on
4. water under the bridge
5. fish out of water
6. does not hold water
7. keep one’s head above water