A site posted that Grandma 's Boy is more disgusting than funny .
On review aggregator website Rotten Tomatoes , the film has a 16 % critic 's rating based on 63 reviews , with an average rating of 3.5/10 , while the audience rating has an 85 % based on 266,086 reviews with an average rating of 3.7/5 .
Grandma's Boy -LRB-2006 film-RRB-