noun. 
                    The act of nibbling; a little bite; also, a small morsel or bit.
                  
                
                  
                    
                    To eat by biting or gnawing off small bits; gnaw.
                  
                
                  
                    
                    To bite very slightly or gently; bite off small pieces of.
                  
                
                  
                    
                    To catch; nab.
                  
                
                  
                    
                    To bite gently; bite off small pieces: as, fishes nibble at the bait.
                  
                
                  
                    
                    Figuratively, to carp; make a petty attack: with at.
                  
                
                  
                    
                    To fidget the fingers about.