The phrase "scientist friend" refers to someone who is both a scientist and your friend. It implies that this person is knowledgeable in scientific subjects and has a close personal relationship with you. Full definition
Don't ask your social scientist friends to help you with your dilemma. (gse.harvard.edu)
Maybe law school dropout Abert Gore Jr. should file a Motion for Admission Pro Hac Vice in the Russian Courts to represent his Climate Scientist Friends in filing a defamation suit. (sistertoldjah.com)
I've had luck shopping for scientist friends on Etsy where you can find like necklaces or mugs or whatever with chemical symbols or different things like that. (corporette.com)