Friendly
Now I'll teach you some signs for friendly and other ways to use that sign. Friendly or not friendly. This is the sign for friendly,and you show a smile on your face. You can even use that for outgoing. Friendly or out going, you'll show a warm face on your facial expressions. You might say moderately friendly, and your face will kind of show that it's so, so, moderately friendly. Not friendly, not friendly. Rude. Rude. Rude. Mean. Mean. Let's review. Friendly. Friendly. Friendly. Not friendly. Not friendly. Rude. Rude. Mean. Out going. Out going. Good job, practice those signs.
Source: http://www.ehow.com/video_4943529_american-sign-language-friendly-unfriendly.html