Body

Blocking

The person wants to distance himself/herself from an undesirable individual. He or she turns away, leans backward, or while sitting, he puts objects on his lap. 

Leaning

We lean towards people we like. We lean with a full body. 

Shoulder shrug

Shoulder shrug indicates a lack of commitment or insecurity. People shrug when they think: "I can't help. It is not my business. Anyway, just leave me alone."