The ornamental design for a barbecuegrillclip, as shown and described.
FIG. 1 is a top perspective view of a barbecue grill clip showing our new design;
FIG. 2 is another top perspective view thereof showing the clip in an open position;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines showing of a spring and a spring support post are for illustrative purposes only; the broken lines form no part of the claimed design.