This is the 2070th most frequent Dutch word.
gast
"Guest."
Here, 'gast' refers to a guest, someone who is visiting temporarily.
Ik heb een gast uit Frankrijk bij mij thuis.
I have a guest from France at my house.
In this context, 'gast' is used colloquially to mean 'guy' or 'man' in an informal setting.
Hij is een goede gast, altijd vriendelijk en behulpzaam.
He is a great guy, always friendly and helpful.
In this usage, 'gast' is part of a compound word ('gastspreker'), referring to a speaker invited to an event.