What are the idiomatic expression letter is v?

Idiomatic expressions beginning with V:

variety is the spice of life - having many different types of experiences bring happiness

veg out - to relax

vested interest - a vested interest is one that's motivated by the potential for personal gain

vicious circle - a cycle of events that make things worse, for example, you eat because you're unhappy, you get fat which makes you even more miserable

virgin territory - something that has never been tried before

vim and vigor - describes a spunky, energetic person

vulture mentality - waiting to take advantage of someone